Vehicle brake mechanism



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Patented Sept. 20, 1932 UNITED STATES PATENT oilfl-lca-A y RAY T. BYMER,AND VERNON L. EMBERY, or sAN DIEGo, cALIroRNIA i VEHICLE BRAKE MEoHANIsMApplication led October 30, 1928. Serial No. 315,938.

y relates Vto vehicle brake mechanisms and the objects of our inventionare: F irst,.to vprovide a brake mechanism having a large frictionsurface thereby reducingthe wear thereof while at the same timeproviding suiiicient and dependable braking action; Second, to provide adevice of this class in which deleterious matter is prevented fromcoming in Contact with the friction surfaces of the brake mechanismthereby greatly increasing the life thereof by reducing the wear causedby gritty particles; Third, to provide a device in which, when the brakeis' in its released position,

` Our invention .the friction surfaces are entirely free from therevolving side ofthe mechanism, thereby practically eliminating uselessWear and consequently prolonging the life of the friction surfaces;Fourth, to provide a device of this class which needs, faces are freefrom the revolving side of the mechanism, only a minimum amount ofmovement in order to bring the friction surfaces in contact with therevolving portions; Fifth, to provide a device of this class in whichalmost all Wear due to friction when the brake. is in released positionand due to the action of deleterious matter is eliminated,

whereby the friction surfaces need-only slight.

attention and last for a long period of time; Sixth, to provide a deviceof this class in which the frictionsurfaces may be easily removedorVreplacedby one `who has little or no mechanical training; Seventh, toprovide a device of this class which does not necessitate a radicalchange in theiconstruction of the conventional wheels, axles and axlehous` provide a device of this class which is especially adaptable tothe vehicle wheel brake and which may be operated with but slight changein the conventionalv brake actuating mechanism; and Ninth, to provide adevice of this class which is sturdy of construction, durable, eiiicientin its action, relatively simple of construction proportional to itsfunctions, and which will not readily deteriorate or getout of order.

With these and other objects in view as willappear hereinafter, ourinvention consists of certain novel features of construction,

although the friction surcombination and arrangement of parts andportions as will be hereinafter described in detail and particularlysetl forth in the appended claims, reference being had to theaccompanying drawing and to the characters of reference thereon-whichform va part 'of' 55 this application in which: igure l is alongitudinal sectional View of our brake mechanism along the linel 1-1of Fig. 2 with parts and portions shown in elevation to facilitate thevillustration and ,60 with thebrake actuating lever and the adjacentportions of a vehicle wheel, axle'and axle housing shown fragmentarily;and Fig. 2 is a transverse sectional View thereof through 2-2 of Fig.lvwith partsand portions shown in elevation to facilitate theillustration. i

Similar characters of reference' refer to similar parts and portionsthroughout the several views of the drawing. f 70 Secured brake plate l,brake'housin 2, sleeve member 3, sliding brake plate 4, riction discsupport 5, friction discs 6, retaining ring 7, lever pin 8, leverbearing 9, act-uating lever 10, lever boot 11, brake release rods 12,cup members 13, pins 14, brake release springs l5, and cap members 16,constitute the principal parts and portions of our brake mechanism.

The brake mechanism is enclosed by a secured brake plate 1, boltedinvthisv case to a Wheel of a vehicle, and a brake housing 2 which maybe secured or. made integral: with a vehicle axle housing A. i

a clrcular, flat disc r'havmg an annular. recessed portion la around theinner'side thereof adjacent to the periphery, as shown best, in Fig. 1.The brake housing is provided with a circular, flat portion 2a formingthe inner side of the brake mechanism, and an annular wall 2b connectedwith the plate portion 2a of the housing and enclosing the peripheralportions of the brake mechanism.

The extended end of the wall 2l) is adapted to fit in the recessedportion la'of the secured brake plate 1 in'such a manner that the brakeplate 1- may revolve rrelative to the brake housing yet` form a jointtherewith 100 The secured brake platezis in the form of 85 f whichprevents dirt or deleterious matter from entering.

The central portion of the brake housing joins the axle housing A andbecomes a continuation thereof forming a bearing housing '20. Mountedwithin `the bearing housing portion2'c and uponan axle D is aconventional'bearing B and a grease retaining washer G. The axle Dextends through the bearing B and is secured by conventional means tothe wheell E, a suitable bearing retaining ring and grease retainingmeans F being rovided between the bearing and the whe'e e Supportedbetween the flat portion 2a of the brake housing and the secured brakeplate around an annular, ridge 1b thereof and around the bearing housingportion 2c is an annular sleeve member 3. This sleeve may be made partof the housing 2, if desired.

Mounted'upon the sleeve 3 by means of an annular opening 4a therein is aflat sliding brake plate 4 which extends `to ithe internal periphery ofthe .wall 2b. This plate is adapted to slideaxially relative to thebrakeI housing. It isV revented from revolving rele housing by means ofkeyways 2e formed in spaced relation in the internal sides of the wall.2b .into which extend lug portions 4b of the sliding brake plate 4.Loosely mounted sonas to slide axially upon the sleeve 3 is a fiatfriction disc support 5.

Secured to each side 4of the friction disc support 5 by any suitablemeans is a friction disc 6. The outer periphery 5a of the disc support 5extends ast the friction discs. The lugs 4b extendng rom the slidingbrake plateinto the keyways 2e also extend axially over the disc supportand secure by screws 7a a retaining ring 7 which `overlaps theperipheral portion of the friction disc support 5, as

shown in Fig. 1. This arrangement permits the friction disc support andfriction discs to -move with `the sliding brake plate yet revolverelative thereto.

Thus it will be noted that the friction discs 6, together with theirsupport 5, are free and'iloat and hence when pressedbetween the disc 4and the wheel plate 1 assume a rotation depending upon the intensity ofthe braking application. l

.Part of ythe-fiat portion 2a forming the inner side of the brakehousing is extended axially inwardly forming a casing portion 2f.vMounted in the casing portion 2 on a pin S which extends into bearings 9ormed `isl a brake.l actuating lever 10 consistin of a bifurcatedportion 10a which strad les the bearing housing portion. The

ends ofthe bifurcated portion 10a are adapted to engage the centralportion o f the slidingbrake plate 4.. Y g v he otherarm 10b of thebrake lever extends outwardly through'an opening 2g inthebrake-'housinglarge enoug to permit shifting of theleqer.

A direction of rotation,

A ilexle boot member ,on the inner side of the sliding plate 4 forreceiving brake releasing rods 12. The bosses 4c lalso serve as a stopmeans for limiting the inward or releasing movement of the plate 4 byengaging the housing 2. The rods 12 are provided with spring retainingcups 13 held in position by pins 14, `Brake releasing springs 15 extendbetween the yretaining cups 13 land the inner side of the housingl 2, asshown in Fig. 1. Thus the springs return the -sliding brake plate to areleased position when the lever 10 is released. `'Vhen the slidingbrake plate 4 isin this positionthe friction discs are entirely freefrom the secured vbrake plate, thereby permitting the secu-red ybrakeplate and wheel to revolve freely. ,Movement of the lever 10 against theaction of the springs causes the outer friction disc 6' to come incontact with the'secued brake plate, which is revolving whenthe vehicleis in motion.- Continued movement of the lever .10 brings the slidingbrake plate 4 firmly against the other friction disc exerting pressurethereon and as the friction discs have a high coefficient of friction agreat deal of brakingl force is applied to the wheel. I'

It can be'. seen fro Fig. 1 that the discs 6 tend to revolve at aspeedapproximately half the speed of rota ion ofthe secured lbrake plateas a result of the two forces in opposite thereby the discs revolverelative to both the fbrake plates. In so doin there is africtionfsurface between both friction discs .and both plates giving amaximumbraking surface in a lminimum amount of space. t It is obviousthat a braking surface inthe form of a disc is easy to maintain contactover the whole surface, thereby preventing uneven wear.

It can also be "seen that in order to renew the' friction discs it isbest in Fig. 1. A suitable cap 16 encloses-the springs and rods. f

kThe springs 15 tendto hold the sliding are provided in spaced relationfrom the 'structure' only necessary to removethe wheel E and theretaining ring 7, whereupon new fric;

tion discs with a new disc support ifdesired, may be inserted. Y

Although in the drawing tliebrake'mech-l anism is shown in connectionwith` av lrear or drive wheel of a vehicle, it is obvious that the brakehousing vmay be secured or made yintegral with a portion of the spindleofthe front orguide wheels of a vehicle.

site sides Furthermore, it can be seen that this brake mechanism isadaptable wherever there is revolving mechanism.

It is obvious rom the construction as illustrated in the drawing anddescribed' in the foregoing specification that there is provided a brakemechanism as aimed at and set forth in the objects of the invention, andthough we have shown and described a particular construction,combination and arrangement oi' parts and portions, we do not wish to belimited to this particular construction, combination and arrangement butdesire to include in the scope of our inventionthe construction,combination and arrangement substantially as set forth in the appendedclaims.

Having thus describeiur invention, what we claim as new and desire tosecure by letters patentis:

l. In abrake mechanism, a plate member revoluble with a vehicle wheel, ahousing locked against rotation adapted to form with said plate member ashield against deleterious matter, a second plate slidably mountedwithin said housing, and a pair of floating friction discs mountedbetween said plates.

2. In a brake mechanism, a plate member revoluble with a vehicle wheel,a housing locked against rotation, a second plate slidably mountedwithin said housing, a floating third plate slidably mounted in saidhousing, friction discs secured to the oppoof said third plate andslidable therewith, and actuating means extending from said housing forshifting said second plate axially and clamping said friction discstween said first and second plates, and spring means for releasing saidplates.

In a brake mechanism, a plate member secured to a revoluble means, ahousing locked against rotation, a second plate slidably mounted withinsaid housing, a floating third plate slidably mounted in said housing,friction discs secured to the opposite sides of said third plate andslidable therewith, actuating means extending from said housing forshifting said second plate axially and clamping said friction discsbetween said first and second plates, and spring means for releasingsaid lates, said housing and said rst plate mem r adapted to form a sealagainst deleterious matter.

4. In a brake mechanism, a plate 'member secured to a revoluble means, ahousing locked against rotation, a second plate slidably mount-ed withinsaid housing, a floating third plate slidably mounted in said housing,friction discs secured to opposite sides of said second plate andslidable therewith, actuating means extending from said housing forshifting said second plate axially and clamping said friction discsbetween said I against deleterious first and second plates, and othermeans for releasing said plates, said housing and said first platemember adapted to form a shield inatter, said actuating means and saidhousing adapted to form therebetween a seal "against deleterious matter.

In testimony whereof, we have hereunto set our hands at San Diego this20th day of October, 1928.

RAY T. HYMER. VERNON L. EMBERY.

ILS

